My HWH air leveling system (2007 CC DP Tribute) will level OK if on a level site but if it is on even a gradually sloped site, it is difficult if not impossible to level. If it does level, according to the HWH computer, it will lose air overnight and will not maintain the leveled condition. Should I replace air leveling with jacks? Can the HWH Air leveling ever be dependable?

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Your HWH system is probably not the same model as mine but maybe it works the same. We have only had the MH a few months but this is what I've found:

When I pull into a site, the first thing I do is turn off the engine and extend the slides. Then I press and hold the "Dump" button to lower the coach as close to the ground as possible so the step is low. Then I press the top left button TWICE which says "level" on the side and "Air" on the button. This starts the automatic leveling. When all the individual amber lights around the outline of the coach are out I know it is level. I don't touch the buttons after that. If something changes later and the coach is no longer level, it will automatically re-level itself.

Unless I'm missing something, I don't have a "Dump Button" . I also press the level mode button twice but on a sloped site, after all the amber lights are out and the indicator says it is level, it will gradually lose the level condition overnight. I'll look for something equivalent to "dump" but all I think I have is an "emergency stop" control button.

On mine the "Dump" button is right below the "Level" button on the left side.
Are you sure you aren't touching the "Level" button again after pressing it twice to level? Also, mine has an "Off" button on the bottom left and if you accidently pushed it after leveling then it would not maintain the level position.

Your HWH system is probably not the same model as mine but maybe it works the same. We have only had the MH a few months but this is what I've found:

When I pull into a site, the first thing I do is turn off the engine and extend the slides. Then I press and hold the "Dump" button to lower the coach as close to the ground as possible so the step is low. Then I press the top left button TWICE which says "level" on the side and "Air" on the button. This starts the automatic leveling. When all the individual amber lights around the outline of the coach are out I know it is level. I don't touch the buttons after that. If something changes later and the coach is no longer level, it will automatically re-level itself.

How does this compare with your procedure?

I follow the same exact procedure that Joe does. There is a 12 volt dc auxiliary air compressor mounted up front to the right of our generator that is part of the HWH system and once the coach is level the compressor maintains it in a level attitude. Both of our coaches are Monaco products and Monaco says that you extend slides before leveling and put the leveling system into Travel Mode before retracting your slides. In this aspect your Country Coach may be different. Also, by dumping the airbags prior to leveling the HWH system will only pump air into the lowest end/side of the coach. This will provide you with much more stability during those windy/stormy times.

If this still doesn't work for you, you may wish to look into the possibility of a slow leak in the air suspension system or failure of the auxiliary compressor.

Going thru similar thing
I replaced the check valve and solonoid at the compressor this helped some, I think some of the check valves at the control blocks are leaking (Have relpacements but not sure were they are YET)
Waiting till I get South to crawl around and find them.(Too damn cold here in Pa)
Good luck

Well talked to the HWH tech
And it seems some of the check valves are leaking and need replaced or cleaned (Going under to try next week)
To check it dump all the air out of your tanks the run the leveling, if you get pressure back in your tanks its getting by the check valves.